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The JRXML templates (or JRXML files) in JasperReport are standard XML files, having an extension of .jrxml. All the JRXML files contain tag , as root element. This in turn contains many sub-elements (all of these are optional). JasperReport framework can handle different kinds of data sources. In this tutorial, we shall show how to generate a basic report, just by passing a collection of Java data object (using Java beans), to the JasperReport Engine. The final report shall display a list of people with the categories including their names and countries.
The Following steps are covered in this chapter to describe — how to design a JasperReport −
- Creating a JRXML Report Template and.
- Previewing the XML Report Template.
Creating a JRXML Report Template
Create the JRXML file, which is jasper_report_template.jrxml using a text editor and save this file in C:toolsjasperreports-5.0.1test as per our environment setup.
Here are the details of main fields in the above report template − Rapidweaver 8 1 4 equals.
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− This is empty (as we are passing data through Java Beans). Usually contains the SQL statement, which retrieves the report result.
− This element is used to map data from data sources or queries, into report templates. name is re-used in the report body and is case-sensitive.
− This element maps the field name with the appropriate element in the XML file.
− This defines the static text that does not depend on any datasources, variables, parameters, or report expressions.
− This defines the appearance of the result field.
$F{country} − This is a variable that contains the value of result, predefined field in the tag .
− Bands contain the data, which is displayed in the report.
Once the report design is ready, save it in C: directory.
Previewing the XML Report Template
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There is a utility net.sf.jasperreports.view.JasperDesignViewer available in JasperReports JAR file, which helps in previewing the report design without having to compile or fill it. This utility is a standalone Java application, hence can be executed using ANT.
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Let's write an ANT target viewDesignXML to view the JRXML. So, let's create and save build.xml under C:toolsjasperreports-5.0.1test directory (should be placed in the same directory where JRXML is placed). Here is the build.xml file −
Next, let's open a command prompt and go to the directory where build.xml is placed. Execute the command ant (As the viewDesignXML is the default target). Output is follows −
Log4j warning can be ignored, and as a result of above execution, a window labeled 'JasperDesignViewer' opens, displaying our report template preview.
As we see, only report expressions for obtaining the data are displayed, as JasperDesignViewer doesn't have access to the actual data source or report parameters. Terminate the JasperDesignViewer by closing the window or by hitting Ctrl-c in the command-line window.
